PHOTOS: The Best of Hubble

Spacecraft telescopes offer rare looks at the solar system and beyond.

Space Pictures from Far Reaches of Universe

(NASA/JPL-Caltech/Space Science Institute)

Saturn's largest and second largest moons, Titan and Rhea, appear to be stacked on top of each other in this true-color scene from NASA's Cassini spacecraft. The north polar hood can be seen on Titan, 3,200 miles across, appearing as a detached layer at the top of the moon on the top right.